EP0844799A2 - Intégration des enregistrements manuels et des enregistrements à des stations de bases personnelles - Google Patents

Intégration des enregistrements manuels et des enregistrements à des stations de bases personnelles Download PDF

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Publication number
EP0844799A2
EP0844799A2 EP97203609A EP97203609A EP0844799A2 EP 0844799 A2 EP0844799 A2 EP 0844799A2 EP 97203609 A EP97203609 A EP 97203609A EP 97203609 A EP97203609 A EP 97203609A EP 0844799 A2 EP0844799 A2 EP 0844799A2
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EP
European Patent Office
Prior art keywords
registration
user
cellular communication
voice
interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97203609A
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German (de)
English (en)
Other versions
EP0844799A3 (fr
Inventor
Stephen G. Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pacific Bell Corp
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Pacific Bell Corp
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Filing date
Publication date
Application filed by Pacific Bell Corp filed Critical Pacific Bell Corp
Publication of EP0844799A2 publication Critical patent/EP0844799A2/fr
Publication of EP0844799A3 publication Critical patent/EP0844799A3/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0029—Provisions for intelligent networking
    • H04Q3/005—Personal communication services, e.g. provisions for portability of subscriber numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/105—PBS [Private Base Station] network

Definitions

  • This invention relates in general cellular technology registration, and more specifically to a system and method for allowing manual registration of a cellular communication unit in addition to personal base station registration.
  • Cellular telephone communications systems allow users of cellular telephones to be connected to other cellular telephone users as well as being connected to the conventional landline Public Switched Telephone Network (PSTN).
  • PSTN Public Switched Telephone Network
  • the mobile characteristics of cellular phone technology has made the cellular phone very popular, and very common, in the past few years.
  • wireline phone rather than a cellular phone where a wireline phone is available.
  • cellular use charges can be avoided by placing and receiving calls on a nearby wireline phone rather than on the cellular phone.
  • a manual registration technique can be used.
  • registration is the procedure by which a mobile station identifies itself to a land station as being active. A newly powered on mobile unit searches for the strongest control channel and communicates with that base station. As long as the mobile unit has power, it continues to report its presence to the base station and monitor the control channel. This type of registration is referred to as periodic registration.
  • the cellular unit is forced to register itself at predefined boundaries in the cellular network. This registration technique is referred to as forced registration.
  • CPE Customer Premises Equipment
  • PBS Personalized Base Station
  • the PBS is designed to be physically positioned in a residence or business and detect the presence of a corresponding cellular handset, which allows the cellular handset to operate in a cordless mode. In this mode, incoming telephone calls are actually being received and originated over the wireline network rather than the cellular network.
  • the present invention discloses a system and method for allowing manual registration of a cellular communication unit in addition to personal base station registration.
  • a method for allowing manual registration of a cellular communication unit in addition to personal base station (PBS) registration comprises entering a request to manually register the cellular communication unit.
  • registration information may be entered, the registration information including a routing number corresponding to a wireline telephone.
  • the registration information is entered via a voice-prompt interface, wherein the user is prompted via voice signaling what information to enter and when to enter it.
  • the method further includes storing the registration information corresponding to the location of the wireline telephone in a wireline visiting location register (wVLR), and updating a home location register (HLR) within a cellular communication database. Maintaining the HLR allows incoming telephone calls to be routed to the wireline telephone corresponding to the routing number in the wVLR.
  • wVLR wireline visiting location register
  • HLR home location register
  • a method for allowing manual registration of a cellular communication unit includes the steps of entering a request to manually register the cellular communication unit.
  • the method includes entering registration information, including a routing number corresponding to a wireline telephone, via a voice-prompt interface to allow a user to enter the registration information from any wireline or wireless telephone.
  • the method further includes integrating the voice-prompt interface and a registration database interface via a messaging protocol.
  • the messaging protocol includes messages from the voice-prompt interface to a local database register to provide the registration information to the local database register within the registration database interface.
  • a global database register is also updated with the registration information to allow incoming calls to be routed to the wireline telephone corresponding to routing number in the local database register.
  • a system for manually registering cellular communication units includes an interactive voice response unit to allow a user to input registration information, including a routing number corresponding to a wireline telephone line.
  • a cellular communication database interface is provided to receive and enter the registration information into a local database register. The information is forwarded to a global database register to allow incoming calls to be routed to the wireline telephone.
  • a common channel signaling (CCS) network which interfaces the interactive voice response unit and the cellular communication database interface, is also provided. The CCS network forwards the registration information via messaging from the voice-prompt interface to the cellular communication database interface.
  • the present invention provides a system and method for allowing manual registration of a cellular communication unit via a voice-prompt interface.
  • FIG. 1 is a diagram of a typical cellular telephone system 10.
  • Cellular telephones work by dividing geographical areas into cells " .
  • FIG. 1 depicts theoretical cell boundaries creating multiple cells 12.
  • Each cell 12 includes a base station 14, which typically contains a transceiver, antenna, and dedicated lines 16 to a Mobile Telephone Switching Office (MTSO) 18.
  • MTSO Mobile Telephone Switching Office
  • Adjacent cells 12 utilize different radio frequencies in order to prevent interference between the adjacent cells 12. Therefore, in the seven-cell depiction of FIG. 1, seven different sets of frequency channels will be used, as the center cell 12 is adjacent to each of the surrounding cells 12.
  • Each cell 12 has at least one setup channel dedicated to signaling between the cell 12 and cellular units within each cell 12, represented by cellular units 20 and 22.
  • Cellular unit 20 represents a generic cellular device, such as a cellular telephone or other device communicating across the wireline and wireless telephone network. The other devices which can communicate across the telephone network include computing devices or computer peripheral devices transmitting and receiving data via modem.
  • Cellular unit 22 represents a cellular telephone installed in an automobile.
  • Each frequency channel may be re-used between cells 12, as long as the re-used channels are not in adjacent cells 12 as previously described, and are far enough apart to avoid excessive interference.
  • a system 10 with a relatively small number of subscribers can therefore use large cells 12, and as demand grows, the cells 12 may be divided into smaller cells.
  • the MTSO 18 manages the interconnection of the cellular network with the external landline (wireline) telephone network, and also controls the base stations 14 in the cells 12 to manage the switching of calls between the cells 12.
  • the MTSO 18 further tracks which cell 12 each cellular unit is in, so that incoming calls may be directed to the intended recipient cellular unit.
  • the MTSO 18 also records call information for billing purposes.
  • a cellular telephone 20 consists of a control unit, a transceiver, and antennas (not shown).
  • the transceiver contains circuits that can tune to any of the channels assigned to the cellular system 10.
  • Each cellular telephone 20 has a unique Electronic Serial Number (ESN) assigned by the manufacturer, which is difficult to change, and is typically unknown to the user. Additionally, each cellular telephone 20 is assigned a 10-digit telephone number, known as a Mobile Identification Number (MIN). In a personal communications service (PCS) system, the MIN is often referred to as the PCS number.
  • ESN Electronic Serial Number
  • MIN Mobile Identification Number
  • PCS personal communications service
  • the cellular telephone system 10 of FIG. 1 includes multiple service areas, including service areas 24, 26 and 28.
  • each of the service areas 24, 26 and 28 is controlled by a dedicated MTSO 18, 30 and 32 respectively.
  • Each cellular service area 24, 26 and 28 is uniquely associated with a digital identification called a System Identification (SID). This typically fifteen-bit SID is used by the cellular telephones to identify the home base station within a particular cellular service area, in order to distinguish a home service area from a external service area other than the one from which service is subscribed.
  • SID System Identification
  • the central office 34 is a zone office for a telephone company which can connect callers between each of the MTSOs 18, 30 and 32 and the external wireline network. Where the central office 34 recognizes that a dialed number is a cellular unit number, the central office 34 forwards the call to the appropriate MTSO.
  • the central office 34 is connected to the Public Switched Telephone Network (PSTN) 36, which in turn may be connected to various other telephone networks, both public and private branch exchanges.
  • PSTN Public Switched Telephone Network
  • FIG. 2 is a block diagram illustrating a Personalized Base Station (PBS) registration.
  • PBS Personalized Base Station
  • the PBS 50 is a specialized piece of Customer Premises Equipment (CPE).
  • CPE Customer Premises Equipment
  • the PBS 50 is designed to reside in a business or residence and detect the cellular or wireless handset 52 when it is within a certain PBS serving area represented by dashed line 54.
  • the PBS 50 is connected to the central office 34 via the PSTN 36.
  • the PBS 50 allows incoming calls directed to the wireless handset 52 from the PSTN 36 to be redirected to the PBS 50 via the wireline network.
  • the PBS 50 operates as a personal base station coupled to the PSTN 36, and communicates with the wireless handset 52 in a cordless " mode.
  • the present invention allows PBS registration to occur, but further allows manual registration where no PBS exists or where the cellular handset 52 is not within the PBS serving area.
  • FIG. 3 illustrates one embodiment of a manual registration interface in accordance with the present invention.
  • the invention includes an interface between an Advanced Intelligent Network (AIN) 100 and a special purpose network device implementing an Authentication and Call Routing Equipment (ACRE) 102 interface. This combination enhances the ACRE device 102 to allow manual registrations as well as PBS registrations.
  • AIN Advanced Intelligent Network
  • ACRE Authentication and Call Routing Equipment
  • the Advanced Intelligent Network (AIN) 100 has the capability to offer a voice-prompt interface, often referred to as Interactive Voice Response (IVR), or in the present invention an Intelligent Peripheral (IP).
  • IVR Interactive Voice Response
  • IP Intelligent Peripheral
  • An IVR or IP is a system that prompts the user to enter information via Dual Tone Multifrequency (DTMF) dialing, and passes the information to a computing system for processing.
  • Voice announcements typically prompt the user for particular information, and also read back the information entered by the user.
  • the AIN 100 offers both a protocol and an architecture for the voice-prompt system.
  • Part of the AIN architecture is the Integrated Service Control Point (ISCP) 104 which directs an Intelligent Peripheral (IP) (not shown) to perform the voice-prompt functions.
  • the IP operates analogously to an Interactive Voice Response (IVR) which is known in the art.
  • IVR Interactive Voice Response
  • the IP therefore audibly prompts the user to enter information via Dual Tone Multifrequency (DTMF) dialing.
  • Voice announcements typically prompt the user for particular information, and also read back the information entered by the user.
  • the ACRE device 102 has the capability to maintain a registration database, labeled the Home Location Register (HLR) 106.
  • the HLR 106 is a centralized database used to track the location of cellular units.
  • a wireline Visitor Location Register (wVLR) 108 associated with the ACRE 102 is notified when the cellular unit is within the corresponding cell.
  • the ACRE 102 updates the HLR 106 to allow the HLR 106 to maintain the location of the cellular unit in any cell of the cellular network.
  • the wVLR 108 When a user makes use of a PBS, and the cellular unit is communicating with the PBS, the wVLR 108 is maintained to store the current location of the cellular unit associated with that PBS.
  • the manual registration feature of the present invention allows users to register themselves in this wVLR 108 without having to use the PBS equipment. Therefore, the manual registration feature allows users to make use of the wVLR 108 where the user does not have a PBS, or is not in proximity to the PBS, by tracking the wireline number manually registered by the user.
  • a different visiting location register typically resides in each serving area within a cellular network. Where manual registration occurs, the wVLR which is used is no longer an active component of the cellular network, but rather is a dedicated database location where the wireline telephone number will be stored. The wVLR that is updated is the visiting location register associated with the "home" serving area. Therefore, when a call is placed to the cellular unit, the home service area is notified as usual. A routing number saved in the home service area wVLR 108 informs the HLR 106 of the wireline number to which to forward incoming calls.
  • the interface between the ISCP 104 and the ACRE 102 takes place over the Common Channel Signaling (CCS) network 110.
  • CCS Common Channel Signaling
  • Common channel signaling is a method of signaling information relating to circuits or functions of network management, and conveyed over a single channel by addressed messages.
  • CCS uses a separate packet-switched network to pass call setup, charging, and supervision information. It can also access the carrier's database to obtain account information such as features and points served on a virtual network.
  • SS7 The standard common channel signaling system adopted by the International Telecommunications Union (ITU) is the Signaling System No. 7 (SS7).
  • SS7 is a common channel signaling protocol used between switching systems, as is known in the art.
  • SS7 has three major components: the Service Switching Point (SSP), the Signaling Transfer Point (STP), and the Service Control Point (SCP).
  • SSP is a tandem switch in the interexchange network, or an end office in the local exchange carrier network.
  • STPs are packet-switching nodes, and the SCPs are databases of circuit, routing, and customer information.
  • IS-411 Interim Standard 41
  • IS-411 is a signaling protocol used to control wireless calls. It may be used within a home service area, and also between a roaming service area and the home service area. Other message sets or messaging protocols could be alternatively used without departing from the scope and spirit of the invention.
  • the present invention utilizes the IS-41 Qualification_Directive message ( QualDir ), depicted by line 112, for the registration interaction from the ISCP 104 to the ACRE 102.
  • the IS-41 Qualification_Request message ( QualReq ), depicted by line 114, is used for the billing interaction from the ACRE 102 to the ISCP 104.
  • FIGS. 4 and 5 illustrate the message structure of the QualDir and QualReq messages respectively.
  • the Mobile Identification Number (MIN) parameter 150 will carry the wireless telephone number which is being registered to the ACRE 102.
  • the registration address 152 provides the routing number, or wireline telephone number, to be stored in the wVLR 108.
  • the QualDir response message is a simple acknowledgment, with no data fields.
  • the Mobile Identification Number (MIN) 160 will carry the wireless number for which a registration or routing is being performed, and the Qualification Information Code 162 parameter will be used to indicate which action has taken place, i.e., a registration or a call routing.
  • the QualReq response message is a simple acknowledgment with no data fields
  • Call routing involves an IS-41 Route_Request from the home HLR 106 to route to the wVLR 108 associated with the ACRE 102.
  • the ACRE 102 responds with the current routing address as an IS-41 Route_Request_Return_Result , and sends an IS-41 Qualification_Request message to the ISCP 104 informing it that a call routing event has taken place. This information is used by the ISCP 104 for billing.
  • FIGS. 6A-6B together comprise a flowchart illustrating the registration process including PBS registration and manual registration in accordance with the present invention.
  • the registration method desired is selected at decision step 200. Where PBS registration is appropriate, control transfers to FIG. 6B via A " 202; otherwise control transfers to step 204 in FIG. 6A.
  • Step 204 represents the request for manual registration, where the user initiates the manual registration procedure. Control then transfers to step 206, where the user accesses the voice-prompt interface in order to enter the registration information at step 208.
  • this registration information includes the personal communications service (PCS) number, a personal identification number (PIN), and a routing telephone number.
  • PCS personal communications service
  • PIN personal identification number
  • routing telephone number a routing telephone number
  • the PCS number is synonymous with the MIN, as it identifies the identification number assigned to the wireless communication unit regardless of the frequency band technology.
  • the registration information is stored in the wVLR 108 at step 210, which in turn updates the HLR with the location information as illustrated at step 212.
  • the PBS monitors for the presence of the cellular unit within the PBS serving area. If the cellular unit is not within the PBS serving area, the PBS continues to monitor for the presence of the cellular unit, as depicted by the path back to the input of decision step 220. Where the cellular unit is within the PBS serving area, it is detected by the PBS, as shown at step 222.
  • the PBS begins the registration process by dialing the dedicated PBS registration number, which is routed to the ACRE 102.
  • an authentication procedure is performed.
  • the ACRE 102 sends the Connect message to the PBS, which contains a random authentication value.
  • the PBS performs the authentication procedure and sends a PB_Authentication message containing its identifier (PBSID) and the result of the authentication procedure.
  • PBSID PB_Authentication message containing its identifier
  • This message also includes a random authentication value for ACRE 102 authentication.
  • the ACRE 102 performs the authentication procedure, and sends the result to the PBS in an Authorization_and_Authentication ACRE message.
  • PBSID PBS identifier
  • the ACRE 102 also uses the PBS identifier to find the MIN and Mobile Serial Number (MSN) of the cellular unit, as shown at step 232.
  • the ACRE 102 sends a Registration_Notification (REGNOT message), containing the pre-stored MIN and MSN of the cellular unit to the HLR 106.
  • the HLR 106 responds through the STP with a Registration_Notification_Acknowledgement (REGNOT message).
  • the routing address is then entered into the wVLR routing table, as shown at step 236.
  • the PBS terminates the call, and the ACRE sends a Qualification_Request ( QualReq ) message to the ISCP 104, informing it that an automatic registration event has taken place, as seen at step 238.
  • This information is used by the ISCP 104 for billing purposes.
  • the ISCP 104 responds with a Qualification_Request_Return_Result ( QualReq ), and the process ends.
  • FIGS. 7A-7B together comprise a flowchart illustrating a more detailed embodiment of the manual registration process in accordance with the present invention.
  • a request for manual registration is presented where a dedicated manual registration number is dialed by the user, as seen at step 250.
  • Step 252 indicates that this call is routed to the SSP, which in turn triggers on the dialed number and sends an info_analyzed (AIN0.1 Message) to the serving ISCP 104.
  • the SSP includes a ten digit terminating trigger.
  • the ISCP 104 sends a Send_To_Resource (AIN0.1 Message) request back to the SSP to request the PCS number (also known as the MIN), as illustrated at step 254.
  • the SSP plays an announcement to the end user requesting the input of the PCS number via the voice-prompt interface.
  • the registration information includes the PCS number, a personal identification number (PIN), and a routing telephone number.
  • the PCS number is dialed by the user at step 258, and the SSP passes the digits to the ISCP 104 in a Send_To_Resource (AIN0.1) message, as shown at step 260.
  • the ISCP 104 sends a Send_To_Resour ce (AIN0.1 Message) request back to the SSP for the authentication PIN, and the SSP plays an announcement to the user to input the PIN number as depicted at step 262.
  • the user inputs the PIN number, and the SSP passes the PIN digits to the ISCP 104 at step 266 in a Send_To_Resource (AIN0.1) message.
  • the ISCP 104 determines whether the PIN and PCS number combination is valid, and if it is valid, control transfers to FIG. 7B via B " 270.
  • Step 272 includes sending a Send_To_Resource (AIN0.1) request from the ISCP 104 to the SSP for the routing telephone number.
  • the SSP plays an announcement to the user requesting the input of the routing telephone number, which the user enters at step 276.
  • the SSP passes the routing telephone number digits to the ISCP 104 in a Send_To_Resource (AIN0.1) message.
  • Step 280 includes sending the registration information from the ISCP 104 to the ACRE 102 in a Qualification_Directiv e ( QualDir ) message via the STP.
  • the ACRE 102 sends a Registration_Notification (REGNOT) message to the HLR 106 via the STP at step 282.
  • Step 284 includes a response by the HLR 106 with a Registration_Notification_Acknowledgement (regnot) message, which is also routed by the STP.
  • the ACRE 102 enters the routing information into the wVLR 108 table, and sends a qualdir response back to the ISCP 104 via the STP at step 286.
  • the ISCP sends a Send_To_Resource message (AIN0.1) back to the SSP instructing it to complete the manual registration interaction, as illustrated at step 288.
  • AIN0.1 Send_To_Resource message
  • the SSP plays the confirmation message to the end user to complete the registration interaction, and terminates the call.
  • the manual registration may be disabled by reactivating the voice-prompt interface to manually disable the manual registration.
  • the manual registration may be disabled by moving the cellular communication unit within the PBS serving area 54, thereby automatically overriding the manual registration by an automatic PBS registration.
  • the manual registration may be disabled by activating the cellular communication unit with the cellular service area 24, 26, or 28, thereby automatically overriding the manual registration by a normal cellular registration.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
EP97203609A 1996-11-22 1997-11-19 Intégration des enregistrements manuels et des enregistrements à des stations de bases personnelles Withdrawn EP0844799A3 (fr)

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US75555696A 1996-11-22 1996-11-22
US755556 1996-11-22

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EP0844799A3 EP0844799A3 (fr) 1999-11-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978982A1 (fr) * 1998-08-05 2000-02-09 Siemens Aktiengesellschaft Procédé de configuration d'un service par un utilisateur
EP1003345A1 (fr) * 1998-11-19 2000-05-24 Alcatel Système de télécommunication sans fil à mobilité étendue
US6853713B1 (en) 1999-12-17 2005-02-08 Nortel Networks Limited Client-server network for managing internet protocol voice packets
WO2006137965A1 (fr) * 2005-06-14 2006-12-28 Motorola Inc. Procede et systeme de renvoi automatique d'appel pour des combines bimode
CN1758621B (zh) * 1999-10-22 2012-12-05 耐克斯特奈特无线公司 无线通信系统中的自动计算机房屋设备登记

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US5197092A (en) * 1990-10-31 1993-03-23 Mccaw Cellular Communications, Inc. Location registration system for a personal communicator such as a cellular telephone
EP0738093A2 (fr) * 1995-04-11 1996-10-16 Telia Ab Système de télécommunications par numéro d'appel personnel

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US5197092A (en) * 1990-10-31 1993-03-23 Mccaw Cellular Communications, Inc. Location registration system for a personal communicator such as a cellular telephone
EP0738093A2 (fr) * 1995-04-11 1996-10-16 Telia Ab Système de télécommunications par numéro d'appel personnel

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Title
LAUER G S: "IN ARCHITECTURES FOR IMPLEMENTING UNIVERSAL PERSONAL TELECOMMUNICATIONS" IEEE NETWORK: THE MAGAZINE OF COMPUTER COMMUNICATIONS, vol. 8, no. 2, 1 March 1994 (1994-03-01), pages 6-16, XP000515075 ISSN: 0890-8044 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978982A1 (fr) * 1998-08-05 2000-02-09 Siemens Aktiengesellschaft Procédé de configuration d'un service par un utilisateur
WO2000008835A1 (fr) * 1998-08-05 2000-02-17 Siemens Aktiengesellschaft Administration de services destinés à un utilisateur
US7366503B2 (en) 1998-08-05 2008-04-29 Siemens Aktiengesellschaft Method for administering a service for a subscriber
CN100393087C (zh) * 1998-08-05 2008-06-04 诺基亚西门子通信有限责任两合公司 业务的管理方法和业务控制装置
EP1003345A1 (fr) * 1998-11-19 2000-05-24 Alcatel Système de télécommunication sans fil à mobilité étendue
FR2786354A1 (fr) * 1998-11-19 2000-05-26 Cit Alcatel Systeme de telecommunication sans fil a mobilite etendue
CN1758621B (zh) * 1999-10-22 2012-12-05 耐克斯特奈特无线公司 无线通信系统中的自动计算机房屋设备登记
US6853713B1 (en) 1999-12-17 2005-02-08 Nortel Networks Limited Client-server network for managing internet protocol voice packets
WO2006137965A1 (fr) * 2005-06-14 2006-12-28 Motorola Inc. Procede et systeme de renvoi automatique d'appel pour des combines bimode

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